Abstract: A bar light source for an edge light panel and an illumination sign board using the same. The bar light source includes a transparent bar member such as acrylic resin. The transparent bar member has a light-source light supplying portion formed at an end of thereof, a transparent incident light supply surface formed elongately on the front surface thereof, and a light guiding pattern printed on the back surface thereof. An optical cable propagates light from a lamp to the light-source light supplying portion. The light guiding pattern guides light to control uniformly the brightness of the bar light source. Thus, the light is supplied onto the incident end surface of the edge light panel in an area illumination board.

Abstract: The present invention provides an incident light supply device which enables the intensity of illumination of an edge light illuminator to be drastically increased, while keeping it thin and reducing power consumption. An edge light panel is provided with a mirror frame at the incident end surface side. A reflection mirror is positioned at an angle to the edge light panel, and spaced away from a linear form light source in the thickness direction, whereby a pseudo-light source that is a virtual image of the linear form light source is obtained. This pseudo-light source is used together with the linear form light source as an incident light source. Between the edge light panels there is a spacing zone, to which the linear form light source is opposed in planar alignment. The location of the reflection mirror is determined such that the pseudo-light source is opposed in planar alignment with the incident end surface of each edge light panel.

Abstract: Reflective material is closely provided to cover the surfaces of a diffusing-reflection arrangements that are defined by a dot pattern on a transparent substrate, thereby fabricating an edge light panel. The diffusing-reflecting arrangements are in microspheric configurations, so that they can act as a condenser lenses, thereby achieving a much higher luminance in combination with the location of the reflective material.